Insurance Repair covered by a warranty ?

Hi, my contract for my samsung s5neo has recently run out but before it did I had it repaired through my vodafone insurance. The phone now has a black screen but still seems to receive messages and the power light and bottom lights come on obviously since my contract is up so is my insurance but I had been informed in a phone shop that a repair should come with a 3 month warranty. It is still inside that and the phone is in perfect Nick due to it hardly being used while waiting a month on my unlock code. Does anyone know about this warranty?

Yes it's past the 24 month warranty and it's not the same issue however they did put a new screen on it which may be causing the problem. Surely if they class the phone as suitable for refurbishment rather than giving you a new one it should work for more than a few weeks.??